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1JB-WD Series JIC Male 74° Cone / BSP Male Captive Seal Adapters The 1JB-WD Series is a straight hydraulic adapter engineered to bridge JIC flared connections and BSP threaded ports. It features a 74° external cone on the JIC male end for flanged or flared tube connections, and a BSP parallel male thread integrated with a captive seal ring on the port end.
This combination offers reliable seal integrity across both sides: metal-to-metal sealing on the JIC flare end and elastic containment on the BSP port end to resist fluid leakage caused by pressure pulsations and thermal expansion.
NBFK manufactures the 1JB-WD series to precision standards, using high-grade materials and surface treatments to ensure long service life in harsh environments. NBFK also supports OEM and customized hydraulic fitting requirements according to customer drawings, specifications, or samples.
JIC Male 74° Cone to BSP Male Captive Seal connection
Straight adapter configuration
High-pressure resistance and leak-free performance
Metal-to-metal seat on JIC end; elastomer captive seal on BSP port end
Wide range of thread sizes (7/16"–1.7/8" JIC to G1/8"–G1.1/2" BSP)
Compact structure for convenient and tight-space installation
Suitable for high-pressure hydraulic tubes, hoses, and valve blocks
OEM and customized specifications supported
| Item | Specification |
| Product Series | 1JB-WD |
| Product Type | JIC Male 74° Cone / BSP Male Captive Seal Adapter |
| E-End Connection | JIC Male 74° Cone |
| F-End Connection | BSP Male Captive Seal (WD Seal) |
| Configuration | Straight |
| JIC Thread Range | 7/16"x20 – 1.7/8"x12 |
| BSP Thread Range | G1/8"x28 – G1.1/2"x11 |
| Sealing Method | 74° Metal Seat (JIC) / Captive Elastomer Seal (BSP) |
| Application | Hydraulic Systems / Fluid Power Piping / Manifold Ports |
| Customization | OEM Available |
| PART NO. | THREAD | CAPTIVE F端 | DIMENSIONS | ||||
| E | F | A | B | L | S1 | ||
| 1JB-04-02WDZ | 7/16"X20 | G1/8"X28 | WD-B02 | 14 | 8 | 29.5 | 14 |
| 1JB-04WDZ | 7/16"X20 | G1/4"X19 | WD-B04 | 14 | 12 | 34.8 | 19 |
| 1JB-04-06WDZ | 7/16"X20 | G3/8"X19 | WD-B06 | 14 | 12 | 35.7 | 22 |
| 1JB-04-08WDZ | 7/16"X20 | G1/2"X14 | WD-B08 | 14 | 14 | 39.2 | 27 |
| 1JB-05-04WDZ | 1/2"X20 | G1/4"X19 | WD-B04 | 14 | 12 | 34.8 | 19 |
| 1JB-05-06WDZ | 1/2"X20 | G3/8"X19 | WD-B06 | 14 | 12 | 35.5 | 22 |
| 1JB-06-02WDZ | 9/16"X18 | G1/8"X28 | WD-B02 | 14.1 | 8 | 31.1 | 17 |
| 1JB-06-04WDZ | 9/16"X18 | G1/4"X19 | WD-B04 | 14.1 | 12 | 35.1 | 19 |
| 1JB-06WDZ | 9/16"X18 | G3/8"X19 | WD-B06 | 14.1 | 12 | 36 | 22 |
| 1JB-06-08WDZ | 9/16"X18 | G1/2"X14 | WD-B08 | 14.1 | 14 | 39.4 | 27 |
| 1JB-08-04WDZ | 3/4"X16 | G1/4"X19 | WD-B04 | 16.7 | 12 | 38 | 22 |
| 1JB-08-06WDZ | 3/4"X16 | G3/8"X19 | WD-B06 | 16.7 | 12 | 38.5 | 22 |
| 1JB-08WDZ | 3/4"X16 | G1/2"X14 | WD-B08 | 16.7 | 14 | 42 | 27 |
| 1JB-10-08WDZ | 7/8"X14 | G1/2"X14 | WD-B08 | 19.3 | 14 | 44.5 | 27 |
| 1JB-10-12WDZ | 7/8"X14 | G3/4"X14 | WD-B12 | 19.3 | 16 | 48.1 | 32 |
| 1JB-12-08WDZ | 1.1/16"X12 | G1/2"X14 | WD-B08 | 21.9 | 14 | 48.5 | 30 |
| 1JB-12WDZ | 1.1/16"X12 | G3/4"X14 | WD-B12 | 21.9 | 16 | 50.9 | 32 |
| 1JB-12-16WDZ | 1.1/16"X12 | G1"X11 | WD-B16 | 21.9 | 18 | 56 | 41 |
| 1JB-16-12WDZ | 1.5/16"X12 | G3/4"X14 | WD-B12 | 23.1 | 16 | 52.7 | 36 |
| 1JB-16WDZ | 1.5/16"X12 | G1"X11 | WD-B16 | 23.1 | 18 | 54.7 | 41 |
| 1JB-16-20WDZ | 1.5/16"X12 | G1.1/4"X11 | WD-B20 | 23.1 | 20 | 59 | 50 |
| 1JB-20-16WDZ | 1.5/8"X12 | G1"X11 | WD-B16 | 24.3 | 18 | 58 | 46 |
| 1JB-20WDZ | 1.5/8"X12 | G1.1/4"X11 | WD-B20 | 24.3 | 20 | 60 | 50 |
| 1JB-20-24WDZ | 1.5/8"X12 | G1.1/2"X11 | WD-B24 | 24.3 | 22 | 63 | 55 |
| 1JB-24-20WDZ | 1.7/8"X12 | G1.1/4"X11 | WD-B20 | 27.5 | 20 | 63.1 | 50 |
| 1JB-24WDZ | 1.7/8"X12 | G1.1/2"X11 | WD-B24 | 27.5 | 22 | 67.1 | 55 |
1JB-WD Series JIC Male 74° Cone / BSP Male Captive Seal Adapters are widely used in construction machinery, agricultural equipment, industrial hydraulic power units, plastic injection molding machines, and automotive manufacturing system fluid lines. They are ideal for connecting flared hydraulic tubing or hoses to valves, cylinders, and pump manifold ports requiring BSP threads with captive sealing.
